Bhagavatapurana 12.3.21

12.3.21

tadā kriyā-tapo-niṣṭhā nāti-hiṃsrā na lampaṭāḥ /
trai-vargikās trayī-vṛddhā varṇā brahmottarā nṛpa //

21. During the age of Treta people are devoted to the performance of Vedic duties and tapas, are not of highly harmful tendencies or addicted to the gratification of the senses; but they are in pursuit of the three purposes of Dharma, Artha, and Kama, strong in Vedic duties; and all the castes of people regard Brahmin to be of the highest order, O king.